JP6978920B2 - Battery module - Google Patents

Battery module Download PDF

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Publication number
JP6978920B2
JP6978920B2 JP2017238731A JP2017238731A JP6978920B2 JP 6978920 B2 JP6978920 B2 JP 6978920B2 JP 2017238731 A JP2017238731 A JP 2017238731A JP 2017238731 A JP2017238731 A JP 2017238731A JP 6978920 B2 JP6978920 B2 JP 6978920B2
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Prior art keywords
battery
circuit board
battery module
multilayer circuit
hole
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JP2019106312A (en
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祐之介 福田
直登 川口
祥朗 齊藤
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FDK Corp
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FDK Corp
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Priority to JP2017238731A priority Critical patent/JP6978920B2/en
Application filed by FDK Corp filed Critical FDK Corp
Priority to PCT/JP2018/042352 priority patent/WO2019116819A1/en
Priority to KR1020207016786A priority patent/KR102488292B1/en
Priority to US16/770,520 priority patent/US11742545B2/en
Priority to EP18889409.1A priority patent/EP3726608B1/en
Priority to CN201880080918.8A priority patent/CN111480247B/en
Priority to TW107143829A priority patent/TWI686986B/en
Publication of JP2019106312A publication Critical patent/JP2019106312A/en
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Publication of JP6978920B2 publication Critical patent/JP6978920B2/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/216—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for button or coin cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/202—Casings or frames around the primary casing of a single cell or a single battery
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Description

本発明は、電池の保持構造に関し、特に回路基板に電池を実装する電池モジュールの構造に関する。 The present invention relates to a battery holding structure, and more particularly to a battery module structure for mounting a battery on a circuit board.

電子機器では、多層回路基板の表面に、コイン形あるいはボタン形と呼ばれる扁平電池を実装した電池モジュールが用いられることが多い。多くは、多層回路基板の表面に形成される実装面に、その他の電子部品と共に電池を実装して、所定の回路を構成している。 In electronic devices, a battery module in which a flat battery called a coin type or a button type is mounted on the surface of a multilayer circuit board is often used. In many cases, a battery is mounted together with other electronic components on a mounting surface formed on the surface of a multilayer circuit board to form a predetermined circuit.

このような電池モジュールでは、低背化やケース収納性が求められるため、電池の正負電極のそれぞれに接続する電極板を用いて、多層回路基板の表面に電池を直接実装することがある。 Since such a battery module is required to have a low profile and a case-storable property, the battery may be directly mounted on the surface of a multilayer circuit board by using electrode plates connected to the positive and negative electrodes of the battery.

上記の電池モジュールの実装手順では、まず、回路基板の厚み方向に貫通する電池室を形成し、電池室の周縁部に更に貫通孔を形成する。そして、電池の正負電極のそれぞれに接続する電極板を、電池室に収容された電池を挟んで、回路基板の貫通孔に固定することにより、電池を回路基板に保持する。このような実装技術が、例えば特許文献１に開示されている。 In the above battery module mounting procedure, first, a battery chamber penetrating in the thickness direction of the circuit board is formed, and a through hole is further formed at the peripheral edge of the battery compartment. Then, the electrode plate connected to each of the positive and negative electrodes of the battery is fixed to the through hole of the circuit board by sandwiching the battery housed in the battery chamber, thereby holding the battery on the circuit board. Such a mounting technique is disclosed in, for example, Patent Document 1.

一方、上記の実装技術では、正負電極それぞれに接続する電極板そのものを、直接回路基板に固定して電池を保持するため、電池の重量を正負電極それぞれに接続する電極板及び回路基板で支持する必要があった。 On the other hand, in the above mounting technology, the electrode plate itself connected to each of the positive and negative electrodes is directly fixed to the circuit board to hold the battery, so that the weight of the battery is supported by the electrode plate and the circuit board connected to each of the positive and negative electrodes. I needed it.

特開２００７−２４２６２９号公報JP-A-2007-242629

しかしながら、電池モジュールの低背化やケース収納性の向上を図るためには、上記のような実装技術と並行して、回路基板の薄膜化及び省面積化も推進されており、回路基板の機械的な強度が低下する傾向がある。このような、薄膜化及び省面積化が進んだ回路基板においては、電池の重量を電極板及び回路基板で十分に支えられず、電極板の破損や電池の脱落により、電池モジュールが通電機能を喪失する問題が顕在化してきた。 However, in order to reduce the height of the battery module and improve the case storage, in parallel with the above-mentioned mounting technology, thinning and area saving of the circuit board are being promoted, and the machine of the circuit board is being promoted. Strength tends to decrease. In such a circuit board that has been made thinner and has a smaller area, the weight of the battery cannot be sufficiently supported by the electrode plate and the circuit board, and the battery module has an energizing function due to damage to the electrode plate or dropping of the battery. The problem of loss has become apparent.

本発明は、このような状況を鑑みてなされたものであり、その目的とするところは、回路基板に電源を供給する電池が、電極板の破損や電池の脱落による不具合を回避しながら多層回路基板上に実装された、耐衝撃性に優れる電池モジュールを提供することにある。 The present invention has been made in view of such a situation, and an object of the present invention is to allow a battery that supplies power to a circuit board to be a multi-layer circuit while avoiding problems due to damage to the electrode plate or dropping of the battery. It is an object of the present invention to provide a battery module having excellent impact resistance mounted on a substrate.

本発明の第１の態様である電池モジュールは、平板部及び平板部から突出する台座部を含む筐体と、台座部が挿通される貫通孔が厚み方向に形成された回路基板と、台座部に設置保持された電池と、を備える。 The battery module according to the first aspect of the present invention includes a housing including a flat plate portion and a pedestal portion protruding from the flat plate portion, a circuit board in which a through hole through which the pedestal portion is inserted is formed in the thickness direction, and a pedestal portion. It is equipped with a battery installed and held in.

本発明の第２の態様によれば、上記第１の態様において、回路基板の貫通孔に挿通される筐体の台座部は、貫通孔を貫通して、回路基板の表面よりも突出する。 According to the second aspect of the present invention, in the first aspect, the pedestal portion of the housing inserted into the through hole of the circuit board penetrates the through hole and protrudes from the surface of the circuit board.

本発明の第３の態様によれば、上記第１の態様又は第２の態様において、回路基板の貫通孔の開口寸法は、電池の外形寸法よりも小さい。 According to the third aspect of the present invention, in the first aspect or the second aspect, the opening size of the through hole of the circuit board is smaller than the external size of the battery.

本発明の第４の態様によれば、上記第１の態様乃至第３の態様のいずれか一つにおいて、電池は、筐体の台座部に、接着材料により固定される。 According to the fourth aspect of the present invention, in any one of the first to third aspects, the battery is fixed to the pedestal portion of the housing by an adhesive material.

本発明の第５の態様によれば、上記第１の態様において、回路基板の貫通孔の開口寸法は、電池の外形寸法よりも大きい。 According to the fifth aspect of the present invention, in the first aspect, the opening size of the through hole of the circuit board is larger than the external size of the battery.

本発明の第６の態様によれば、上記第５の態様において、筐体の台座部に設置保持された電池の一部が、回路基板の貫通孔内に配置される。 According to the sixth aspect of the present invention, in the fifth aspect, a part of the battery installed and held in the pedestal portion of the housing is arranged in the through hole of the circuit board.

本発明によれば、回路基板に電源を供給する電池が、電極板の破損や電池の脱落による不具合を回避しながら回路基板上に実装された、耐衝撃性に優れる電池モジュールを提供することができる。 According to the present invention, it is possible to provide a battery module having excellent impact resistance, in which a battery that supplies power to a circuit board is mounted on the circuit board while avoiding problems due to damage to the electrode plate or dropping of the battery. can.

本発明の実施例に係る電池モジュールの外観を示す斜視図。The perspective view which shows the appearance of the battery module which concerns on embodiment of this invention. 図１に示す電池モジュールを筐体と多層回路基板と電池とに分解した斜視図。The perspective view which disassembled the battery module shown in FIG. 1 into a housing, a multilayer circuit board, and a battery. 図１中の線分Ａ−Ａ´に沿う電池モジュールの断面図。FIG. 3 is a cross-sectional view of a battery module along the line segment AA'in FIG. 図１中の線分Ｂ−Ｂ´に沿う電池モジュールの断面図Cross-sectional view of the battery module along the line segment BB'in FIG. 本発明の変形例に係る電池モジュールの外観を示す斜視図。The perspective view which shows the appearance of the battery module which concerns on the modification of this invention. 図５に示す電池モジュールを筐体と多層回路基板と電池とに分解した斜視図。FIG. 5 is a perspective view of the battery module shown in FIG. 5 disassembled into a housing, a multilayer circuit board, and a battery. 図５中の線分Ｃ−Ｃ´に沿う電池モジュールの断面図。FIG. 5 is a cross-sectional view of the battery module along the line segment CC'in FIG. 図５中の線分Ｄ−Ｄ´に沿う電池モジュールの断面図Cross-sectional view of the battery module along the line segment DD'in FIG.

＜実施例＞
以下、本発明の実施例について図１から図４を参照して説明する。図１は電池モジュールの全体の外観を示し、図２はその電池モジュールの主要部分を分解した図を示し、図３はその電池モジュールの断面（図１中のＡ−Ａ´矢視）を示し、図４は多層回路基板の断面(図２中のＢ−Ｂ´矢視)を示している。 <Example>
Hereinafter, examples of the present invention will be described with reference to FIGS. 1 to 4. FIG. 1 shows the overall appearance of the battery module, FIG. 2 shows an exploded view of the main part of the battery module, and FIG. 3 shows a cross section of the battery module (AA'arrow view in FIG. 1). , FIG. 4 shows a cross section of the multilayer circuit board (BB'arrow view in FIG. 2).

電池モジュール１は、図１乃至図４からわかるように筐体２、多層回路基板１０、電池２０、及び蓋部３０により構成される。多層回路基板１０は、導電層が１層である単層の回路基板であってもよい。 As can be seen from FIGS. 1 to 4, the battery module 1 is composed of a housing 2, a multilayer circuit board 10, a battery 20, and a lid portion 30. The multilayer circuit board 10 may be a single-layer circuit board having one conductive layer.

筐体２は平板部３を含み、当該平板部３から上方に突出する台座部４を含み、台座部４の上部は、概ね平坦面である上表面５となっている。多層回路基板１０の表面側には電池モジュールを形成するための複数の電子部品１６が配置され、筐体２の台座部４が挿通される貫通孔１１が厚み方向に貫通して形成されている。この貫通孔１１の周縁部の多層回路基板１０の表面には、表面から厚み方向に少し窪ませたパッド収容部１７が設けられ、パッド収容部１７内にはパッド部１８ａ、１８ｂ（図４では省略）が設けられている。 The housing 2 includes a flat plate portion 3, includes a pedestal portion 4 projecting upward from the flat plate portion 3, and the upper portion of the pedestal portion 4 is an upper surface 5 which is a substantially flat surface. A plurality of electronic components 16 for forming a battery module are arranged on the surface side of the multilayer circuit board 10, and a through hole 11 through which the pedestal portion 4 of the housing 2 is inserted is formed so as to penetrate in the thickness direction. .. On the surface of the multilayer circuit board 10 at the peripheral edge of the through hole 11, a pad accommodating portion 17 slightly recessed from the surface in the thickness direction is provided, and the pad accommodating portions 18a and 18b (in FIG. 4). Omitted) is provided.

電池２０には、正負の電極それぞれに電極板２２ａ、２２ｂが取り付けられている。電極板２２ａは電池２０の一表面に設けられた正負電極のうちの一方の電極に接続され、電池２０の側方に突出するまで延伸する。更に、側方に突出した部分で屈曲して電池２０の一表面の反対側の他表面に向かって延伸し、電池２０の他表面と概ね同一平面上で電池２０の側方外向きに再度屈曲してパッド部１８ａへの接続部を形成する。 The battery 20 has electrode plates 22a and 22b attached to positive and negative electrodes, respectively. The electrode plate 22a is connected to one of the positive and negative electrodes provided on one surface of the battery 20 and extends until it protrudes to the side of the battery 20. Further, it is bent at the laterally protruding portion and stretched toward the other surface on the opposite side of one surface of the battery 20, and is bent again outward on the side of the battery 20 on substantially the same plane as the other surface of the battery 20. A connection portion to the pad portion 18a is formed.

一方、電極板２２ｂは電池２０の他表面に設けられた他方の電極に接続され、電池２０の側方に突出するまで延伸し、パッド部１８ｂへの接続部を形成する。ここで、電極板２２ａのパッド部１８ａへの接続部及び電極板２２ｂのパッド部１８ｂへの接続部は、同一平面上で接続可能な位置に形成されている。 On the other hand, the electrode plate 22b is connected to the other electrode provided on the other surface of the battery 20 and extends until it projects laterally to the battery 20 to form a connection portion to the pad portion 18b. Here, the connection portion of the electrode plate 22a to the pad portion 18a and the connection portion of the electrode plate 22b to the pad portion 18b are formed at positions where they can be connected on the same plane.

また、これら、多層回路基板１０及び電池２０を覆うように、筐体２上に蓋部３０を設置されている。すなわち、筐体２及び蓋部３０が協働して電池２０を収容する空間を形成し、密閉された当該空間内に電池２０が配置されている。 Further, a lid portion 30 is installed on the housing 2 so as to cover the multilayer circuit board 10 and the battery 20. That is, the housing 2 and the lid 30 cooperate to form a space for accommodating the battery 20, and the battery 20 is arranged in the sealed space.

図２に示すように、多層回路基板１０は、その貫通孔１１に筐体２の台座部４を挿通させた状態で、多層回路基板１０の、複数の電子部品１６が配置された表面とは反対側の裏面が、筐体２の平板部３上に固定されて設置される。このとき、図３及び図４に示すとおり、台座部４の厚みは多層回路基板１０の厚みよりも大きいため、台座部４は多層回路基板１０の貫通孔１1を貫通し、台座部４は多層回路基板１０の表面から更に上方に突出している。 As shown in FIG. 2, the multilayer circuit board 10 has a surface of the multilayer circuit board 10 on which a plurality of electronic components 16 are arranged in a state where the pedestal portion 4 of the housing 2 is inserted through the through hole 11. The back surface on the opposite side is fixed and installed on the flat plate portion 3 of the housing 2. At this time, as shown in FIGS. 3 and 4, since the thickness of the pedestal portion 4 is larger than the thickness of the multilayer circuit board 10, the pedestal portion 4 penetrates the through hole 11 of the multilayer circuit board 10 and the pedestal portion 4 has multiple layers. It projects further upward from the surface of the circuit board 10.

そして、台座部４が多層回路基板１０の表面から更に上方に突出した状態において、電池２０が台座部４の上表面５に設置保持される。電池２０が接着剤等の接着材料で上表面５に固定されるとなおよい。また、上表面５が多層回路基板１０の表面から上方に突出していることから、台座部４の上表面５の外形寸法を電池２０の外形寸法より小さくしても、電池２０が多層回路基板１０に直接接触しないように設置することができる。 Then, the battery 20 is installed and held on the upper surface 5 of the pedestal portion 4 in a state where the pedestal portion 4 projects further upward from the surface of the multilayer circuit board 10. It is even more preferable that the battery 20 is fixed to the upper surface 5 with an adhesive material such as an adhesive. Further, since the upper surface 5 projects upward from the surface of the multilayer circuit board 10, even if the outer dimension of the upper surface 5 of the pedestal portion 4 is smaller than the outer dimension of the battery 20, the battery 20 is the multilayer circuit board 10. It can be installed so that it does not come into direct contact with.

すなわち、台座部４の上表面５の面積は、電池２０を上表面５に固定して、その重量を支えることができれば十分なので、台座部４を挿通する貫通孔１１の開口の大きさをできるだけ小さくすることができる。これにより、多層回路基板１０の面積の縮小を図ることが可能となり、且つ多層回路基板１０の機械的強度の向上にも寄与する。 That is, the area of the upper surface 5 of the pedestal portion 4 is sufficient if the battery 20 can be fixed to the upper surface 5 and support its weight, so the size of the opening of the through hole 11 through which the pedestal portion 4 is inserted can be made as large as possible. It can be made smaller. This makes it possible to reduce the area of the multilayer circuit board 10 and contribute to improving the mechanical strength of the multilayer circuit board 10.

また、電池２０を多層回路基板１０に接続する電極板２２ａ、２２ｂの接続部の形状は、同一平面上で接続可能に形成されている。従って、電極板２２ａ、２２ｂが多層回路基板１０の表面のパッド部１８ａ、１８ｂにそれぞれ接触するように、電池２０を台座部４の上表面５に設置することができる。 Further, the shapes of the connecting portions of the electrode plates 22a and 22b for connecting the battery 20 to the multilayer circuit board 10 are formed so as to be connectable on the same plane. Therefore, the battery 20 can be installed on the upper surface 5 of the pedestal portion 4 so that the electrode plates 22a and 22b come into contact with the pad portions 18a and 18b on the surface of the multilayer circuit board 10, respectively.

このように、電池２０は、筐体２の台座部４に接着して固定されているので、その重量はすべて筐体２のよって支えられており、電池が脱落することはない。また、電池２０の重量に起因する応力が、多層回路基板１０や電極板２２ａ、２２ｂに加わることもない。これにより多層回路基板１０及び電極板２２ａ、２２ｂの破損が抑制される。 In this way, since the battery 20 is adhered and fixed to the pedestal portion 4 of the housing 2, the weight of the battery 20 is entirely supported by the housing 2, and the battery does not fall off. Further, the stress caused by the weight of the battery 20 is not applied to the multilayer circuit board 10 and the electrode plates 22a and 22b. As a result, damage to the multilayer circuit board 10 and the electrode plates 22a and 22b is suppressed.

加えて、多層回路基板１０は筐体２の平板部３上に固定して設置しておけば、たとえ薄膜化されて機械的な強度が低下した多層回路基板１０であっても、その形状が変形することはないから、多層回路基板１０から電極板２２ａ、２２ｂに応力が加わることはない。従って、電極板２２ａ、２２ｂは電極板自体の重量を支える強度があれば、電池モジュール１への外部からの衝撃等によって電極板２２ａ、２２ｂ自身が破損して電気的な導通を損なうことはない。 In addition, if the multilayer circuit board 10 is fixedly installed on the flat plate portion 3 of the housing 2, the shape of the multilayer circuit board 10 will be changed even if the multilayer circuit board 10 is thinned and the mechanical strength is lowered. Since it is not deformed, no stress is applied to the electrode plates 22a and 22b from the multilayer circuit board 10. Therefore, if the electrode plates 22a and 22b have the strength to support the weight of the electrode plates themselves, the electrode plates 22a and 22b themselves will not be damaged by an external impact on the battery module 1 and the electrical conduction will not be impaired. ..

以上の通り、本発明は、多層回路基板１０上に実装されて電源を供給する電池２０の、電極板２２ａ、２２ｂの破損や電池２０の脱落を防止する。これにより、モジュール外部からの衝撃による電源供給機能の喪失を回避可能な耐衝撃性に優れる電池モジュール１を提供するという特有の効果を奏することができる。 As described above, the present invention prevents the electrode plates 22a and 22b of the battery 20 mounted on the multilayer circuit board 10 and supplying power from being damaged and the battery 20 from falling off. As a result, it is possible to obtain a unique effect of providing the battery module 1 having excellent impact resistance, which can avoid the loss of the power supply function due to the impact from the outside of the module.

＜変形例＞
上記本発明の実施例では、多層回路基板１０の貫通孔１１が電池２０よりも小さく、筐体２の台座部４の厚みが、多層回路基板１０の厚みよりも厚く、台座部４が多層回路基板１０の表面よりも上方に突出する構造である。しかしながら、電池モジュール１を構成する多層回路基板１０の厚みや電池２０の外形には様々な仕様がある。 <Modification example>
In the above embodiment of the present invention, the through hole 11 of the multilayer circuit board 10 is smaller than the battery 20, the thickness of the pedestal portion 4 of the housing 2 is thicker than the thickness of the multilayer circuit board 10, and the pedestal portion 4 is the multilayer circuit. The structure is such that it projects upward from the surface of the substrate 10. However, there are various specifications in the thickness of the multilayer circuit board 10 constituting the battery module 1 and the outer shape of the battery 20.

本発明の変形例について図５から図８に示した。図５は電池モジュールの全体の外観を示し、図６はその電池モジュールの主要部分を分解した図を示し、図７はその電池モジュールの断面（図５中のＣ−Ｃ´矢視）を示し、図８は多層回路基板の断面(図５中のＤ−Ｄ´矢視)を示している。上述の実施例と同一の部分の説明は省略する。 Modifications of the present invention are shown in FIGS. 5 to 8. FIG. 5 shows the overall appearance of the battery module, FIG. 6 shows an exploded view of the main part of the battery module, and FIG. 7 shows a cross section of the battery module (CC'arrow view in FIG. 5). , FIG. 8 shows a cross section of the multilayer circuit board (DD'arrow view in FIG. 5). The description of the same part as that of the above-described embodiment will be omitted.

図５に示すように、多層回路基板１０には、その厚み方向に貫通する貫通孔１１１が設置されている。そして、この貫通孔１１の周縁部の多層回路基板１０の裏面には、裏面から厚み方向に少し窪ませたパッド収容部１１７が設けられ、パッド収容部１１７内にはパッド部１１８ａ、１１８ｂが設けられている。 As shown in FIG. 5, the multilayer circuit board 10 is provided with a through hole 111 penetrating in the thickness direction thereof. Then, on the back surface of the multilayer circuit board 10 at the peripheral edge of the through hole 11, a pad accommodating portion 117 slightly recessed from the back surface in the thickness direction is provided, and pad portions 118a and 118b are provided in the pad accommodating portion 117. Has been done.

ここで、多層回路基板１０は、その貫通孔１１１に筐体２の台座部４を挿通可能な位置に、筐体２の平板部３上にスペーサー１２により固定して設置される。このとき、図７及び図８に示すとおり、多層回路基板１０と、筐体２の平板部３との間には空間が形成され、台座部４の上表面５は多層回路基板１０の表面から窪んだ位置にある。 Here, the multilayer circuit board 10 is fixedly installed on the flat plate portion 3 of the housing 2 by a spacer 12 at a position where the pedestal portion 4 of the housing 2 can be inserted into the through hole 111 thereof. At this time, as shown in FIGS. 7 and 8, a space is formed between the multilayer circuit board 10 and the flat plate portion 3 of the housing 2, and the upper surface 5 of the pedestal portion 4 is from the surface of the multilayer circuit board 10. It is in a recessed position.

そして、台座部４が多層回路基板１０の表面から窪んだ状態において、電池２０が台座部４の上表面５に設置される。電池２０が接着剤等の接着材料で上表面５に固定されるとなおよい。また、台座部４の上表面５は多層回路基板１０の表面から窪んでいるから、電池２０が多層回路基板１０に直接接触しないように、貫通孔１１１の開口寸法の大きさは電池２０の外形寸法よりも大きくしておく必要がある。 Then, the battery 20 is installed on the upper surface 5 of the pedestal portion 4 in a state where the pedestal portion 4 is recessed from the surface of the multilayer circuit board 10. It is even more preferable that the battery 20 is fixed to the upper surface 5 with an adhesive material such as an adhesive. Further, since the upper surface 5 of the pedestal portion 4 is recessed from the surface of the multilayer circuit board 10, the size of the opening dimension of the through hole 111 is the outer shape of the battery 20 so that the battery 20 does not come into direct contact with the multilayer circuit board 10. It needs to be larger than the dimensions.

このとき、電池２０が、多層回路基板１０の貫通孔１１１内の一部分を占めて配置されるように、台座部４の上表面５が貫通孔１１１の内部にあってもよい。また、電池２０が貫通孔１１１全体を占めて配置されるように、台座部４の高さを低くして、台座部４の上表面５が、多層回路基板１０の裏面よりも下方、すなわち貫通孔１１１の外側にあってもよい。 At this time, the upper surface 5 of the pedestal portion 4 may be inside the through hole 111 so that the battery 20 is arranged so as to occupy a part of the through hole 111 of the multilayer circuit board 10. Further, the height of the pedestal portion 4 is lowered so that the battery 20 occupies the entire through hole 111, and the upper surface 5 of the pedestal portion 4 is below the back surface of the multilayer circuit board 10, that is, penetrates. It may be outside the hole 111.

ここで、電池２０の正負電極のそれぞれに接続された電極板２２ａ、２２ｂの形状は、それら電極板のパッド部１１８ａ、１１８ｂへの接続部が、同一平面上で接続可能に形成されている。従って、電極板２２ａ、２２ｂを多層回路基板１０の裏面のパッド部１１８ａ、１１８ｂのそれぞれに接触するように、電池２０を台座部４の上表面５上に設置することができる。 Here, the shapes of the electrode plates 22a and 22b connected to the positive and negative electrodes of the battery 20 are formed so that the connection portions of the electrode plates to the pad portions 118a and 118b can be connected on the same plane. Therefore, the battery 20 can be installed on the upper surface 5 of the pedestal portion 4 so that the electrode plates 22a and 22b are in contact with the pad portions 118a and 118b on the back surface of the multilayer circuit board 10.

前述の本発明の実施例では、電池モジュール１の厚みは、少なくとも、筐体２の厚み、多層回路基板１０の厚み、及び電極板２２ａ、２２ｂを含む電池２０の厚みの総和よりも厚くなる（図３、図４参照）。 In the above-described embodiment of the present invention, the thickness of the battery module 1 is at least larger than the sum of the thickness of the housing 2, the thickness of the multilayer circuit board 10, and the thickness of the battery 20 including the electrode plates 22a and 22b. See FIGS. 3 and 4).

一方、本変形例では、多層回路基板１０の厚みには依存せず、筐体２の厚み及び電極板２２ａ、２２ｂを含む電池２０の厚みだけに依存するので（図７、図８参照）、低背化により有利である。 On the other hand, in this modification, it does not depend on the thickness of the multilayer circuit board 10, but only on the thickness of the housing 2 and the thickness of the battery 20 including the electrode plates 22a and 22b (see FIGS. 7 and 8). It is advantageous to reduce the height.

このように、本発明は、多層回路基板１０の厚みや電池２０の外形の仕様によって、種々の変形を行って、より最適な電池モジュール１を構成することができる。 As described above, according to the present invention, the battery module 1 can be more optimally configured by making various modifications depending on the thickness of the multilayer circuit board 10 and the specifications of the outer shape of the battery 20.

なお、本変形例においても、多層回路基板１０及び電池２０はいずれも、筐体２の平板部３及び台座部４の上表面５にそれぞれ固定されて支えられている。 Also in this modification, both the multilayer circuit board 10 and the battery 20 are fixed and supported on the upper surface 5 of the flat plate portion 3 and the pedestal portion 4 of the housing 2, respectively.

従って、上記実施例と同様に、本変形例は、多層回路基板１０上に実装されて電源を供給する電池２０の、電極板２２ａ、２２ｂの破損や電池２０の脱落を防止する。これにより、モジュール外部からの衝撃による電源供給機能の喪失を回避可能な耐衝撃性に優れる電池モジュール１を提供するという特有の効果を奏することができる。 Therefore, similarly to the above embodiment, this modification prevents the electrode plates 22a and 22b of the battery 20 mounted on the multilayer circuit board 10 and supplying power from being damaged and the battery 20 from falling off. As a result, it is possible to obtain a unique effect of providing the battery module 1 having excellent impact resistance, which can avoid the loss of the power supply function due to the impact from the outside of the module.

１ 電池モジュール
２ 筐体
３ 平板部
４ 台座部
５ 上表面
１０ 多層回路基板
１１、１１１ 貫通孔
１２ スペーサー
１６ 電子部品
１７、１１７ パッド収容部
１８ａ、１８ｂ、１１８ａ、１１８ｂ パッド部
２０ 電池
２２ａ、２２ｂ 電極板
３０ 蓋部 1 Battery module 2 Housing 3 Flat plate 4 Pedestal 5 Top surface 10 Multi-layer circuit board 11, 111 Through hole 12 Spacer 16 Electronic component 17, 117 Pad housing 18a, 18b, 118a, 118b Pad 20 Battery 22a, 22b Electrode Plate 30 lid

Claims (6)

平板部及び前記平板部から突出する台座部を含む筐体と、
前記台座部が挿通される貫通孔が厚み方向に形成された回路基板と、
前記台座部に設置保持された電池と、
を備える電池モジュール。 A housing including a flat plate portion and a pedestal portion protruding from the flat plate portion, and
A circuit board in which a through hole through which the pedestal portion is inserted is formed in the thickness direction, and
Batteries installed and held on the pedestal,
Battery module with. 前記回路基板の前記貫通孔に挿通される前記筐体の前記台座部は、前記貫通孔を貫通し
て、前記回路基板の表面よりも突出する、
請求項１に記載の電池モジュール。 The pedestal portion of the housing inserted into the through hole of the circuit board penetrates the through hole and protrudes from the surface of the circuit board.
The battery module according to claim 1. 前記回路基板の前記貫通孔の開口寸法は、前記電池の外形寸法よりも小さい、
請求項１又は２に記載の電池モジュール。 The opening size of the through hole of the circuit board is smaller than the external size of the battery.
The battery module according to claim 1 or 2. 前記電池は、前記筐体の前記台座部に、接着材料により固定される、
請求項１乃至３のいずれか１項に記載の電池モジュール。 The battery is fixed to the pedestal portion of the housing by an adhesive material.
The battery module according to any one of claims 1 to 3. 前記回路基板の前記貫通孔の開口寸法は、前記電池の外形寸法よりも大きい、
請求項１に記載の電池モジュール。 The opening size of the through hole of the circuit board is larger than the external size of the battery.
The battery module according to claim 1. 前記筐体の前記台座部に設置保持された電池の一部が、前記回路基板の前記貫通孔内に
配置される、請求項５に記載の電池モジュール。 The battery module according to claim 5, wherein a part of the battery installed and held in the pedestal portion of the housing is arranged in the through hole of the circuit board.
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